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JOSEPH H B. BENNETT,` OF BROOKLYN, NEW YORK Leners Patent No. 74,744, daad Fama-y 25, 1868.

IMPROVEMENT IN ROTARY ENGINES.

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TO ALL WHOM IT MAY CONCERN:

Be it known that I, 'JOSEPH B. BENNETT, of Brooklyn, in the county of Kings, and in the State of New York, have invented certain new and useful Improvements in Combined Rotary Engine and Bump; and do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon.

In the annexed drawings, making part of this specilication, A represents a. cylinder, which is provided with two steam-tight heads. Withinthe cylinder A is placed a wheel, B, which is provided with a rim, which is made as deep as the cylinder is Wide between its heads. This wheel B is provided with a hul) at its centre, and through4 this hub passes a shaft, C, Between the hub and the rim of the wheel is an, annular cavity, on each face ofthe wheel, and within these cavities are placed the rim-wheels D D, one in each cavity. The wheel B is less in diameter than the inner diameter ofthe cylinder A, and is placed eccentrically in said cylinder, so that, when in position, its periphery lightly touches the inner periphery of' ,the cylinder. The shaft of wheel B has its bearing in suitable openings in the heads of' cylinder A. The wheel B has three equidistant `openings cut through its rim from one side to tbe other, and in these openings three pistons, E E E,'are placed. The pistons are. just long enough to reach from the inner periphery of the cylinder to the peripheries of the rim-wheels D, so that the wheels D are always concentric with cylinder A. A metallic spring is placed in a groove in the periphery of the Wheels D D, and these springs t snugly against the inner ends ofthe pistons. The object of the rim-wheels D is to keep the pistons in their proper. places at the proper timefn'hile the inner periphery of cylinder A forces them in, and the object of the springs around the wheels D isdto take up any slack in the pistons, and keep themw snugly in position. The periphery of cylinder A has through it two steam-openings,

H H, one for receiving and the other for discharging steam.

It will readily be seen that the rim-wheels D, although they revolve, can never change position in relation lto the inner periphery of the cylinder, as it is permanently separated from said inner peripheryjust the length ofthe pistons.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is- 'Ihe arrangement of the springs around thewheels D, with the pistons EE and cylinder A, substantially as and for the purposes specified.

In testimony that I claim the` foregoing, I have hereunto set my hand, this 2d day of July, 1867.

' JOSEPH B. BENNETT.

Witnesses:

J ULIUs BROWN, JOSEPH BELLESHIEM, 

